Self-measuring oil-pump.



J. B. DAVIS. SELF MEASURING OIL PUMP.

IIIIIIIIIIIII LED JUN-B81906.

SSSSSSSSSSSSS 1.

gT/ /z I 5 3 7 I 413 @E- 37 I? (grw 7/ IQT. V

mmm T EI IIEH mun;

BAT'ENTED 112d. 3, 1907.

No. 872,501: PATENTED DEC. 3, 1907.

J. B. DAVIS.

I SELF MEASURING OIL PUMP.

APPLICATION FILED JUNE 8 1906 2 SHEETS-$113111 2.

g 5 5 IIIIIIWIIIIIW 2 LI I ,1 I

JOHN B. DAVIS, OF DAYTON, OHIO.

OFFICE.

SE LIP-MEASURING- OIL-PUMP.

Specification of Letters Patent. Application filed June 8, 1906. SerialNo. 320.787.

Patented Dec. 3, 1907.

To all whom it may concern:

Be it known that I, J OHN B. DAVIS, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Self-MeasuringOil-Pumps; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make. and use the same, reference beinghad to the accompany-- ing drawings, and to the letters and figures ofreference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in self-measuringoil pumps, and comprises a single cylinder and piston. The oil isdischarged during both movements of the piston, in pints, quarts orgallon quantities, or any specific quantity.

The object of the invention is to provide a single cylinder pump fordispensing oil, the same having the structural features hereinafterdescribed and claimed. Access to the valves may be had withoutdisturbing any of the parts of the pump.

In the accompanying drawings,Figure 1, is a front elevation of the pump,the middle portion of the cylinder being broken away. Fig. 2, is a viewat right angles to Fig. 1 with the middle portion broken away. Fig. 3,is a sectional view through the length of the cylinder on the lines w-acof Fig. 2, and cc:x; of Fig. 4. Fig. 4, is a top plan view of thecylinder head, the upper frame being removed. Fig. 5, is a bottom planview of the base of the pump. Fig. 6, is a cross sectional view of thecylinder head on the line y/y of Fig. 3. Fig. 7, is a sectional view onthe line V-V of Fig. 8, and VV of Fig. 5. Fig. 8, is a sectional view ofthe cylinder base on the line WW of Fig. 3, and W W of Fig. 7.

In a detail description of the invention, similar reference charactersindicate corresponding parts.

The ump cylinder 9 is secured between the cylinder head 19 and thecylinder base 1 by a suitable number of tie rods 29. The base 1 hasprojected from its lower side a pipe nozzle 3 which is screw-threaded toreceive a supply pipe (not shown) which discharges into the main chamber8 in said base.

On opposite sides of said base there are extensions 22, one of whichprovides a bychamber 8 which communicates with the chamber 8, and theother of which provides a chamber 7 which is separated from the chamber8 by a division wall 6. In the wall above the by-chamber 8 there is asuction port 4 which will be again referred to. Above the chamber 8 andon one side of the by-chamber 8 there is an upper auxiliary chamber 14inclosed by an integral wall 12, said chamber 14 communicating with thecylinder 9 below the piston 18. The bychamber 8 communicates with thepump cylinder 9 above the piston 18 through the suction port 4 and pipe5- to be again referred to. The chamber 7 forms an outlet from the pumcylinderbelow the piston through an out et pipe 5 and ports 10 and 11.The suction pipe 5 and the outlet pipe 5 are secured between the head 19and the base 1 and located at the upper ends'of said pipes 5-5 a arevalves 28-28. These valves 28-28 are located in by-chambers 21 formed byextensions 20 on opposite sides of the head 19; one of said chamberscommunicating with the main chamber 22 in said head and the other ofsaid by-chambers communicating with a chamber 23 which is separated fromthe main chamber 22 by a partition wall 24, the converging ends of whichprovide a centrally-disposed hub 25 through which the piston rod 26passes. Located in the main chamber 22 is an outlet charge pipe 34through the chamber 22 to be again referredto. The suction valve 28supplies the chamber 23, and said chamber 23 ,communicates with theupper end of the pump cylinder 9 through a port 30. The main chamber 22is supplied through the valve 28 at the upper end of the pipe 5. Thevarious valves are easy of access for removal and repairs withoutdetaching any portion of the pump, said valves being inclosed by screwcaps or covers 35 which fit into openings in the base 1 and the head 19respectively.

The piston rod passes through a stuffing box 27 above the cylinder headand has connected to its upper end a vertical rack 36, the lower end ofwhich has a laterally projected head 37; this rack is guided in a frame38 39, the latter beingmounted on plate 19 above the cylinder head 19.The rack 36 is driven from a pinion 40 having its journals valve 33which communicates with the diswhich is supported at the top ofstandards 2 mounted in the frame 38, and the said pinion is driven froma crank 41 having a suitable handle.

One side of the standards or uprights 39 is provided with indicationsdenoting the different quantities of oil measured from the pumpaccording to the throw of the piston through the rack 36. In the presentinstance these indications denote quarts and gallons, but it will beunderstood that the indications may be arranged to denote pints, quartsand gallons in excess of one gallon. Adjacent to each of suchindications there is an aperture 42 extending through the standard andadapted to receive a pin 43 which forms a stop limiting the upwardmovement of the piston by engaging the stop 37 on the lower end of therack. As the indications are now shown upon the standards, this pin 43is in a position to limit the movementof the piston to the discharge oftwo quarts of oil, and it will be clearly seen that the pin may beplaced in any of the apertures and thus the movement of the piston beregulated to discharge any of the measures of oil indicated. Thedischarge pipe 34 which as before indicated communicates with the outletchamber 22 in the head, through the valve 33 and 28-, and the upper endof this pipe has a discharge nozzle-34 with a hook 44 thereon to supportthe vessel into which the oil is discharged.

The operation of the pump is briefly described as follows: Assuming thatthe piston as it appears in Fi 3 is descending, the oilpreviouslyadmitteiI to the cylinder 9 below the piston under suctioncreated by the previous up-movement of said piston, and through thevalve 15, auxiliary chamber 14, and port 17 is forced under pressureinto chamber 7 through port 10, and into the outlet pipe 5 through port11 and into the chamber 22 in the head 19 through valve 28. The samepressure opens the discharge valves 28 and 33, and forces the oilthrough the discharge pipe 34. During this movement of the piston thesuction valve 15 is closed and the piston creates a vacuum or partialvacuum above it within the cylinder which is immediately filled with oilwhich is supplied thereto under suction through the port 4, valve 28 andthe port 30, which as before stated, forms a communication between thechamber 23 in the head and the upper end of the cylinder above thepiston. Upon the reverse or upward movement of the piston, the oil soadmitted above the piston is dis charged to the chamber 22 through thevalve 33 under pressure, and from the chamber 22 to the pipe 34.

An important feature of the improvements, and which alone enable asingle cylinder pump to discharge continuously inaccurate measures,during its operation, is referred to. It will be seen that at all timesthe piston rod displaces a certain proportion of the oil above thepiston, said portion of oil so displaced being equal to the length ofthe submerged portion of said rod multiplied by its cross sectionalarea. Assuming for example, that it is desired to discharge from thepump a half gallon measure, the piston in its upward movement woulddischarge a fraction less than half of that amount, or a fraction lessthan one quart owing to the displacement of oil by the piston rod; inthe downward movement of said piston, it will discharge a fraction morethan half that quantity or a fraction more than a quart, owing to therebeing no displacement of oil below the piston, and thus the amount ofoil displaced above the piston is compensated for.

I claim:

In a pump of the type specified, a cylinder, a piston therein, a basejoining the cylinder and having a main inlet chamber fed through anaxial opening, and an auxiliary inlet chamber above the main inletchamber, the inlet to the auxiliary chamber from the main chamber beingcontrolled by a valve which is located out of the plane of the cylinder,the said auxiliary inlet chamber communicating with the cylinder belowthe piston, an exterior cover inserted in the base above the valve whichcontrols the communication between the main and auxiliary inletchambers. and by means of which access is had to said valve, the saidbase having a third chamber communicating with the cylinder through avalveless port and forming the outlet from the cylinder below thepiston, a cylinder head having a main outlet chamber which communicateswith both ends of the cylinder, a valve-controlled pipe parallel withthe cylinder and through which is established a communication betweenthe third chamber ,in the base and the outlet chamber in the head, saidcylinder head having an inlet chamber to the upper end of the cylinder,and a valve-controlled pipe establishing a communication betweenthelower end of the cylinder and the inlet'chamber in the head, allarranged substantially as specified.

In testimony whereof I affix my signature, in presence of two witnesses.

' JOHN B. DAVIS.

Witnesses R. J. MoCARTY,

C. M. THEOBALD

